David Rientjes <rientjes@xxxxxxxxxx> writes: >> Is this a claim that memory-intensive workloads will have the exact same >> performance with and without memcg enabled? > I've just run specjbb2005 three times on my system both with and without > cgroup_disable=memory on the command line and it is consistently 1% faster > without memcg. If I add XX:+UseLargePages to the command line to use > hugepages it's even larger. So why must I incur this performance > degradation if I simply want to control who may mmap hugepages out of the > global pool? Even if we end up having a seperate controller for hugetlb, we would need some bits of memcg, like tracking page cgroup, moving page cgroup on page offline. We will also be duplicating some amount of framework for supporting cgroup removal etc, because all those code deal with struct page (actually compound page ) -aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
